package com.itheima.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.common.R;
import com.itheima.entity.Employee;
import com.itheima.service.EmployeeService;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.DigestUtils;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;

@Slf4j
@RestController
@RequestMapping("/employee")
public class EmployeeController extends BaseController {

    @Autowired
    private EmployeeService employeeService;

    /**
     * 后台员工登录
     *
     * @param
     * @param employee
     * @return
     */
    @PostMapping("/login")
    public R<Employee> login(HttpSession session, @RequestBody Employee employee) {

        //1.将页面提交的密码password进行md5加密算法
        String outPassword = employee.getPassword();
        String newPassword = DigestUtils.md5DigestAsHex(outPassword.getBytes());

        //2.根据页面提交的用户名username查询数据库
        LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper<>();
        //Lambda格式按条件查询，eq是equals的缩写。
        //对比当前employee对象的getUsername和页面提交的username是否一样
        queryWrapper.eq(Employee::getUsername, employee.getUsername());
        Employee emp = employeeService.getOne(queryWrapper);

        //3.如果没有查询到则返回登录失败结果
        if (emp == null) {
            return R.error("登录失败，用户名不存在");
        }

        //4.密码比对，如果不一致则返回登录失败结果
        if (!emp.getPassword().equals(newPassword)) {
            return R.error("登录失败，密码错误！");
        }

        //5.查看员工状态，如果为已禁用状态，则返回员工已禁用结果
        if (emp.getStatus() == 0) {
            return R.error("账号已被禁用！");
        }

        //6.登录成功，将员工id存入session并返回登录成功结果
//        request.getSession().setAttribute("employeeId",emp.getId());
        session.setAttribute("employeeId", emp.getId());
//        session.setAttribute("username", emp.getUsername());
        return R.success(emp);

    }

    /**
     * 后台员工退出
     *
     * @param request
     * @return
     */
    @PostMapping("/logout")
    public R<String> logout(HttpServletRequest request) {
        //清理session中保存的当前登录员工的id
        request.getSession().removeAttribute("employeeId");
        return R.success("退出成功");
    }

    /**
     * 新增/修改员工
     *
     * @param employee
     * @return
     */
    @PostMapping
    public R<String> save(HttpSession session, @RequestBody Employee employee) {

        log.info("新增员工，员工信息：{}", employee.toString());

        //对新增员工设置初始密码为：123456，需要用md5加密算法，后续员工登录以后可以自行修改密码
        employee.setPassword(DigestUtils.md5DigestAsHex("123456".getBytes()));
        //补充4个日志字段
//        employee.setUpdateTime(LocalDateTime.now());
//        employee.setUpdateUser(getUidFromSession(session));
//        employee.setCreateTime(LocalDateTime.now());
//        employee.setCreateUser(getUidFromSession(session));
        //调用service方法
        employeeService.save(employee);
        return R.success("新增员工成功");
    }

    /**
     * 员工信息分页查询
     *
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
    @GetMapping("/page")
    public R<Page> page(int page, int pageSize, String name) {

        log.info("page = {},pageSize = {},name = {}", page, pageSize, name);

        //构造分页构造器
        Page pageInfo = new Page(page, pageSize);
        //构造条件构造器
        LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper<>();
        //添加过滤条件
        queryWrapper.like(StringUtils.isNotEmpty(name), Employee::getUsername, name);
        //添加排序条件
        queryWrapper.orderByDesc(Employee::getUpdateTime);
        //执行查询
        Page result = employeeService.page(pageInfo, queryWrapper);
        if (result == null) {
            return R.error("查询时产生未知的异常！");
        }
        return R.success(pageInfo);
    }

    /**
     * 禁用/启用员工状态 和 修改员工信息 使用的是同一个方法
     *
     * @param employee
     * @return
     */
    @PutMapping
    public R<String> update(HttpSession session, @RequestBody Employee employee) {
        log.info(employee.toString());
        //补全日志
//        employee.setUpdateTime(LocalDateTime.now());
//        employee.setUpdateUser(getUidFromSession(session));
        //调用方法更新数据
        employeeService.updateById(employee);

        return R.success("员工信息修改成功！");
    }

    /**
     * 根据员工id来查询员工信息并回显
     *
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    public R<Employee> getById(@PathVariable Long id) {
        log.info("根据id查询员工信息");
        Employee employee = employeeService.getById(id);
        if (employee != null) {
            return R.success(employee);
        }
        return R.error("没有查询到此员工信息，请稍后再试");
    }

}
